Datasheet

MAX3969
200Mbps SFP Limiting Amplifier
_______________________________________________________________________________________ 3
Typical Operating Characteristics
(V
CC
= +3.3V, PECL outputs terminated with 50Ω to V
CC
- 2V, R1 = 100kΩ, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
(PECL OUTPUTS OPEN)
MAX3969 toc01
AMBIENT TEMPERATURE (°C)
SUPPLY CURRENT (mA)
603510-15
5
10
15
20
25
30
35
40
45
50
55
60
0
-40 85
1ns/div
OUTPUT EYE DIAGRAM
(V
IN
= 2mV
P-P
, 155Mbps, 2
23
- 1 PRBS)
200mV/div
MAX3969 toc02
1ns/div
OUTPUT EYE DIAGRAM
(V
IN
= 1500mV
P-P
, 155Mbps, 2
23
- 1 PRBS)
200mV/div
MAX3969 toc03
TRANSFER FUNCTION
MAX3969 toc04
DIFFERENTIAL INPUT VOLTAGE (mV
P-P
)
DIFFERENTIAL OUTPUT VOLTAGE (mV
P-P
)
10001001010.1
800
1000
1200
1400
1600
1800
600
0.01 10,000
BIT ERROR RATIO vs. DIFFERENTIAL
INPUT VOLTAGE
MAX3969 toc05
DIFFERENTIAL INPUT VOLTAGE (mV
P-P
)
BIT ERROR RATIO
0.4
10-03
0
10-04
10-05
10-06
10-07
10-08
10-09
10-10
10-11
10-12
0.1
0.2
0.3
0.5
0.6
0.7
0.8
155Mbps
2
23
- 1 PRBS
RSSI VOLTAGE vs. DIFFERENTIAL
INPUT VOLTAGE
MAX3969 toc06
DIFFERENTIAL INPUT VOLTAGE (mV
P-P
)
V
RSSI
(V)
10010
1.20
1.40
1.60
1.80
2.00
2.20
2.40
2.60
2.80
3.00
1.00
11000
RSSI LOAD > 10kΩ
155Mbps
2
23
- 1 PRBS
LOS LOW
LOS HIGH
1.4
1.6
1.5
1.9
1.8
1.7
2.2
2.1
2.0
2.3
-40 0 20-20 40 60 80 100
RSSI VOLTAGE vs. TEMPERATURE
(LOS LOW, RSSI LOAD > 10kΩ)
MAX3969 toc07
AMBIENT TEMPERATURE (°C)
V
RSSI
(V)
INPUT = 100mV
P-P
INPUT = 50mV
P-P
INPUT = 10mV
P-P
INPUT = 5mV
P-P
POWER-DETECT THRESHOLD vs. R2
(R1 = 100kΩ)
MAX3969 toc08
R2 (kΩ)
DIFFERENTIAL INPUT VOLTAGE (mV
P-P
)
1101009080706050403020
10
100
1000
1
10 120
SD LOW/
LOS HIGH
SD HIGH/
LOS LOW
155Mbps
2
23
- 1 PRBS
0
3
2
1
4
5
6
7
8
9
10
-40 10-15 35 60 85
LOSS-OF-SIGNAL HYSTERESIS
vs. TEMPERATURE
MAX3969 toc09
AMBIENT TEMPERATURE (°C)
20log (V
DEASSERT
/ V
ASSERT
) (dB)
155Mbps
2
23
-1 PRBS
R2 = 10kΩ
R2 = 50kΩ